code: def inside_gamut(r, g, b):
      """
      Test whether a requested colour is within the gamut
      achievable with the primaries of the current colour
      system.  This amounts simply to testing whether all the
      primary weights are non-negative. */
      """
      return (r >= 0) and (g >= 0) and (b >= 0)
  
file_path: vispy/examples/demo/gloo/galaxy/galaxy_specrend.py
imports: import math
label_desc: Use image node_id 4 for calling a global function with example usage: inside_gamut(r, g, b) and returns: unknown